Add KeePass2RandomStream class.

It's responsible for processing protected strings in kdbx files.

tests/CMakeLists.txt

@@ -114,3 +114,5 @@ add_unit_test(NAME testcryptohash SOURCES TestCryptoHash.cpp MOCS TestCryptoHash
 add_unit_test(NAME testsymmetriccipher SOURCES TestSymmetricCipher.cpp MOCS TestSymmetricCipher.h LIBS ${TEST_LIBRARIES})
 
 add_unit_test(NAME testhashedblockstream SOURCES TestHashedBlockStream.cpp MOCS TestHashedBlockStream.h LIBS ${TEST_LIBRARIES})
+
+add_unit_test(NAME testkeepass2randomstream SOURCES TestKeePass2RandomStream.cpp MOCS TestKeePass2RandomStream.h LIBS ${TEST_LIBRARIES})

tests/TestKeePass2RandomStream.cpp

@@ -0,0 +1,74 @@
+/*
+ *  Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TestKeePass2RandomStream.h"
+
+#include "crypto/CryptoHash.h"
+#include "crypto/SymmetricCipher.h"
+#include "format/KeePass2.h"
+#include "format/KeePass2RandomStream.h"
+
+#include <QtTest/QTest>
+
+void TestKeePass2RandomStream::test()
+{
+    const QByteArray key("\x11\x22\x33\x44\x55\x66\x77\x88");
+    const int SIZE = 128;
+
+
+    SymmetricCipher cipher(SymmetricCipher::Salsa20, SymmetricCipher::Stream, SymmetricCipher::Encrypt,
+                           CryptoHash::hash(key, CryptoHash::Sha256), KeePass2::INNER_STREAM_SALSA20_IV);
+
+    const QByteArray data(QByteArray::fromHex("601ec313775789a5b7a7f504bbf3d228f443e3ca4d62b59aca84e990cacaf5c5"
+                                              "2b0930daa23de94ce87017ba2d84988ddfc9c58db67aada613c2dd08457941a6"
+                                              "1abc932417521ca24f2b0459fe7e6e0b090339ec0aa6faefd5ccc2c6f4ce8e94"
+                                              "1e36b26bd1ebc670d1bd1d665620abf74f78a7f6d29809585a97daec58c6b050"));
+
+    QByteArray cipherPad;
+    cipherPad.fill('\0', SIZE);
+    cipher.processInPlace(cipherPad);
+
+    QByteArray cipherData;
+    cipherData.resize(SIZE);
+
+    for (int i=0; i<SIZE; i++) {
+        cipherData[i] = data[i] ^ cipherPad[i];
+    }
+
+
+    KeePass2RandomStream randomStream(key);
+    QByteArray randomStreamData;
+    randomStreamData.append(randomStream.process(data.mid(0, 7)));
+    randomStreamData.append(randomStream.process(data.mid(7, 1)));
+    QByteArray tmpData = data.mid(8, 12);
+    randomStream.processInPlace(tmpData);
+    randomStreamData.append(tmpData);
+    randomStreamData.append(randomStream.process(data.mid(20, 44)));
+    randomStreamData.append(randomStream.process(data.mid(64, 64)));
+
+
+    SymmetricCipher cipherEncrypt(SymmetricCipher::Salsa20, SymmetricCipher::Stream, SymmetricCipher::Encrypt,
+                                  CryptoHash::hash(key, CryptoHash::Sha256), KeePass2::INNER_STREAM_SALSA20_IV);
+    QByteArray cipherDataEncrypt = cipherEncrypt.process(data);
+
+
+    QCOMPARE(randomStreamData.size(), SIZE);
+    QCOMPARE(cipherData, cipherDataEncrypt);
+    QCOMPARE(randomStreamData, cipherData);
+}
+
+QTEST_MAIN(TestKeePass2RandomStream);

tests/TestKeePass2RandomStream.h

@@ -0,0 +1,31 @@
+/*
+ *  Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSX_TESTKEEPASS2RANDOMSTREAM_H
+#define KEEPASSX_TESTKEEPASS2RANDOMSTREAM_H
+
+#include <QtCore/QObject>
+
+class TestKeePass2RandomStream : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void test();
+};
+
+#endif // KEEPASSX_TESTKEEPASS2RANDOMSTREAM_H